With California 503B licensure now secured, McGuff Outsourcing Solutions (MOS) is entering its next phase: building reliable inventory, delivering consistent product availability, and expanding access nationwide. Our priority is simple—becoming the stable, long-term 503B partner clinics can depend on.

McGuff's 503B outsourcing facility, McGuff Outsourcing Solutions (MOS), is preparing to launch. Stay updated with our progress.

McGuff Outsourcing Solutions (MOS) operates within a commercial pharmaceutical manufacturer with FDA-approved drug experience, bringing manufacturing-grade systems, oversight, and discipline to compounded sterile medications.

Since the enactment of the Drug Quality and Security Act (DQSA) in 2013, McGuff has remained actively engaged in supporting science-based regulatory decision-making related to compounded sterile drug products, with a consistent focus on patient safety, product quality, and regulatory transparency.